216 SUMMARY OF CONCLUSIONS. 



§ 2. If it is desired to have a formulated expression of 

 the sequence of phenomena in the genetic cycle, the follow- 

 ing may be taken as a sort of medium statement : — 



I, PROTOMORPHIC STAGE. 



Development of the fecundated Germ into a rudimen- 

 tary asexual organism, serving as the matrix of 

 the typical form. 



Gemmation, or formation in connection with this 

 matrix of one or more growths of a new and 

 different kind. — (Scolex, Redici.) 



II. — ORTHOMORPHIC STAGE. 



Development of such a growth into an organism of the 



typical form of the species. 

 Gemmation, or formation in the typical organism of 



new points of growth, for the development of 



reproductive organs. 



III. — GAMOMORPHIC STAGE. 



Development of the new growth into a more or less 

 complex structure, serving as a receptacle of true 

 sexual organs (Medusoid, Prothallium, &c.) 



Gemmation, or formation in such structures of sper- 

 matic and germinal bodies, the latter, on fecunda- 

 tion by the former, constituting the starting point 

 of a new cycle. 



§ 8. In applying this formula to the case of the higher 

 species, the protomorphic matrix must be held as repre- 

 sented by the cellular mass, resulting from the cleavage of 

 the germ on impregnation, and serving as the basis of the 



